Exercise: Tezos Delegation Service

In this exercise, you will build a Golang service that gathers all delegations made on the Tezos protocol and exposes them through a public API.

Requirements:

The solution is composed of two parts:

• It must poll delegations:
  • Retrieve delegations from this Tzkt API endpoint: https://api.tzkt.io/#operation/Operations_GetDelegations
  • For each delegation, save the following information: sender's address, timestamp, amount, and block height.
  • The data aggregation must store the delegations data in a persistent store of your choice.
  • It must have all data since since Tezos launched in 2018.
  • The service must continuously poll new delegations made on the network.
• It must expose the collected data through a public API endpoint:

  • The endpoint must be available at: GET /xtz/delegations

  • The API must read data from the store.

  • The response format must be:

    {
      "data": [ 
        {
            "timestamp": "2022-05-05T06:29:14Z",
            "amount": "125896",
            "delegator": "tz1a1SAaXRt9yoGMx29rh9FsBF4UzmvojdTL",
            "level": "2338084"
        },
        {
            "timestamp": "2021-05-07T14:48:07Z",
            "amount": "9856354",
            "delegator": "KT1JejNYjmQYh8yw95u5kfQDRuxJcaUPjUnf",
            "level": "1461334"
        }
      ],
    }
    

  • The sender’s address is the delegator.

  • The delegations must be listed most recent first.

  • The endpoint takes one optional query parameter year, which is specified in the format YYYY and will result in the data being filtered for that year only.

  • The result must be paginated 50 at a time.

Additional notes

• The code must be tested.
• How to run the solution locally must be simple and documented.
• The solution must thrive to be simple while fulfilling all the requirements.

Please share a archive ( zip , tar or equivalent) of your git project via email.